function setCookie(name,value,day=20)
{
	var exp = new Date();
	exp.setTime(exp.getTime() + day*24*60*60*1000);
	document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}

function getCookie(name)
{
	var arr, reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
	if(arr=document.cookie.match(reg))
		return unescape(arr[2]);
	else
		return null;
}